CVE-2023-33009
CISA KEV
ACT NOW
Priority: 0.00
BB Relevance:
6/100
Published: N/A
Modified: N/A
First seen: 2026-10-29
Status: pending_score
Description
Zyxel ATP, USG FLEX, USG FLEX 50(W), USG20(W)-VPN, VPN, and ZyWALL/USG firewalls contain a buffer overflow vulnerability in the notification function that could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and remote code execution on an affected device.
CISA Known Exploited Vulnerability
Vendor / Product
Zyxel — Multiple Firewalls
Date Added
2023-06-05
Remediation Due
2023-06-26
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-buffer-overflow-vulnerabilities-of-firewalls; https://nvd.nist.gov/vuln/detail/CVE-2023-33009